Background:

Cabozantinib malate is a potent inhibitor of MET andVEGF receptor2 with IC50 values of 1.3nM and 0.035nM [1].

Cabozantinib is a pan-tyrosine kinase inhibitor and is developed as an oral treatment of various cancers including MTC, GBM, NSCLC, pancreatic carcinoma, breast and colon cancer. The targets of cabozantinib are MET, VEGFR-2, RET, FLT3, KIT, AXL as well as TEK. In cellular assays, cabozantinib inhibits the phosphorylation of MET, VEGFR2, KIT, FLT3 and AXL with IC50 values of 7.8, 1.9, 5.0, 7.5 and 42μM, respectively [1, 2].

As a pan-tyrosine kinase inhibitor, cabozantinib can affect many biological processes. Cabozantinib inhibits the tubule formation of HMVEC cells with IC50 value of 6.7nM. In B16F10 cells, cabozantinib inhibits HGF-inducedmigration and invasion with IC50 values of 31nM and 9nM, respectively. Moreover, cabozantinib shows anti-proliferation efficacy in a variety of tumors such as SNU-5, Hs746T, MDA-MB-231 and U87MG. It is also reported that the combination of cabozantinib and gefitinib can cause potent inhibition of the gefitinib-resistant HCC827GR6 cell line [1, 2].

参考文献:
[1] Yakes F M, Chen J, Tan J, et al. Cabozantinib (XL184), a novel MET and VEGFR2 inhibitor, simultaneously suppresses metastasis, angiogenesis, and tumor growth. Molecular cancer therapeutics, 2011, 10(12): 2298-2308.
[2] Zhang Y, Guessous F, Kofman A, et al. XL-184, a MET, VEGFR-2 and RET kinase inhibitor for the treatment of thyroid cancer, glioblastoma multiforme and NSCLC. IDrugs, 2010, 13(2): 112.